./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:42:16,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:42:16,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:42:16,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:42:16,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:42:16,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:42:16,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:42:16,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:42:16,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:42:16,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:42:16,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:42:16,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:42:16,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:42:16,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:42:16,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:42:16,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:42:16,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:42:16,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:42:16,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:42:16,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:42:16,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:42:16,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:42:16,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:42:16,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:42:16,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:42:16,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:42:16,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:42:16,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:42:16,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:42:16,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:42:16,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:42:16,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:42:16,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:42:16,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:42:16,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:42:16,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:42:16,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:42:16,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:42:16,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:42:16,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:42:16,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:42:16,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:42:16,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:42:16,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:42:16,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:42:16,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:42:16,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:42:16,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:42:16,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:42:16,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:42:16,223 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:42:16,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:42:16,224 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:42:16,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:42:16,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:42:16,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:42:16,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:42:16,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:42:16,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:42:16,226 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:42:16,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:42:16,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:42:16,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:42:16,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:42:16,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:42:16,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:42:16,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:42:16,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:42:16,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:42:16,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:42:16,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:42:16,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:42:16,230 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:42:16,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:42:16,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:42:16,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1726b0c52a0be10cb8b374bfde8cdbfe3513d4b934203f7e56a3a1bce5e9e5b [2022-11-21 13:42:16,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:42:16,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:42:16,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:42:16,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:42:16,586 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:42:16,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/loop-acceleration/array_2-1.i [2022-11-21 13:42:19,593 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:42:19,821 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:42:19,822 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/sv-benchmarks/c/loop-acceleration/array_2-1.i [2022-11-21 13:42:19,828 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/data/f670c9d2c/b97deddaa869499381b1797850926526/FLAGf7914f7d9 [2022-11-21 13:42:19,843 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/data/f670c9d2c/b97deddaa869499381b1797850926526 [2022-11-21 13:42:19,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:42:19,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:42:19,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:42:19,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:42:19,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:42:19,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:19" (1/1) ... [2022-11-21 13:42:19,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3facc3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:19, skipping insertion in model container [2022-11-21 13:42:19,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:19" (1/1) ... [2022-11-21 13:42:19,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:42:19,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:42:20,030 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/sv-benchmarks/c/loop-acceleration/array_2-1.i[849,862] [2022-11-21 13:42:20,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:42:20,055 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:42:20,068 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/sv-benchmarks/c/loop-acceleration/array_2-1.i[849,862] [2022-11-21 13:42:20,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:42:20,089 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:42:20,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20 WrapperNode [2022-11-21 13:42:20,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:42:20,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:42:20,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:42:20,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:42:20,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,107 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,123 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2022-11-21 13:42:20,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:42:20,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:42:20,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:42:20,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:42:20,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:42:20,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:42:20,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:42:20,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:42:20,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (1/1) ... [2022-11-21 13:42:20,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:42:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:20,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:42:20,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:42:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:42:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:42:20,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:42:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:42:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:42:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:42:20,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:42:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:42:20,345 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:42:20,347 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:42:20,479 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:42:20,486 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:42:20,487 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:42:20,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:20 BoogieIcfgContainer [2022-11-21 13:42:20,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:42:20,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:42:20,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:42:20,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:42:20,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:42:19" (1/3) ... [2022-11-21 13:42:20,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2a5f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:20, skipping insertion in model container [2022-11-21 13:42:20,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:20" (2/3) ... [2022-11-21 13:42:20,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2a5f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:20, skipping insertion in model container [2022-11-21 13:42:20,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:20" (3/3) ... [2022-11-21 13:42:20,514 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2022-11-21 13:42:20,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:42:20,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 13:42:20,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:42:20,627 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2644d7b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:42:20,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 13:42:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:42:20,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:20,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:20,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash 212047733, now seen corresponding path program 1 times [2022-11-21 13:42:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:20,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495920709] [2022-11-21 13:42:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:20,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:42:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:20,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495920709] [2022-11-21 13:42:20,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495920709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:42:20,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:42:20,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:42:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64798188] [2022-11-21 13:42:20,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:42:20,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:42:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:42:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:42:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:42:20,933 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:42:21,018 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-11-21 13:42:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:42:21,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-21 13:42:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:42:21,031 INFO L225 Difference]: With dead ends: 30 [2022-11-21 13:42:21,031 INFO L226 Difference]: Without dead ends: 15 [2022-11-21 13:42:21,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:42:21,043 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:42:21,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:42:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-21 13:42:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-11-21 13:42:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-21 13:42:21,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-11-21 13:42:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:42:21,093 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-21 13:42:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-21 13:42:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:42:21,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:21,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:42:21,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:21,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1312443705, now seen corresponding path program 1 times [2022-11-21 13:42:21,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:21,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276707717] [2022-11-21 13:42:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:42:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276707717] [2022-11-21 13:42:21,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276707717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:42:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818727999] [2022-11-21 13:42:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:21,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:21,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:42:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:42:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 13:42:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:42:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:42:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:42:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:42:21,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818727999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:42:21,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:42:21,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-21 13:42:21,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885823341] [2022-11-21 13:42:21,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:42:21,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:42:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:42:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:42:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:42:21,521 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:42:21,611 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-21 13:42:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:42:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-21 13:42:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:42:21,612 INFO L225 Difference]: With dead ends: 33 [2022-11-21 13:42:21,612 INFO L226 Difference]: Without dead ends: 25 [2022-11-21 13:42:21,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-21 13:42:21,614 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:42:21,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:42:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-21 13:42:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-21 13:42:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-21 13:42:21,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2022-11-21 13:42:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:42:21,628 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-21 13:42:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-21 13:42:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 13:42:21,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:21,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:21,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:42:21,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:21,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash 682476165, now seen corresponding path program 2 times [2022-11-21 13:42:21,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:21,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708188072] [2022-11-21 13:42:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:21,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:42:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708188072] [2022-11-21 13:42:22,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708188072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:42:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124912161] [2022-11-21 13:42:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:42:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:22,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:42:22,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:42:22,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:42:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:42:22,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:42:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:42:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:42:22,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:42:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 13:42:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124912161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:42:22,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:42:22,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-21 13:42:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090105815] [2022-11-21 13:42:22,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:42:22,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:42:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:42:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:42:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:42:22,531 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:42:22,666 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-11-21 13:42:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:42:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-21 13:42:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:42:22,671 INFO L225 Difference]: With dead ends: 63 [2022-11-21 13:42:22,671 INFO L226 Difference]: Without dead ends: 49 [2022-11-21 13:42:22,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:42:22,676 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:42:22,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 16 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:42:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-21 13:42:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-21 13:42:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-21 13:42:22,694 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 24 [2022-11-21 13:42:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:42:22,695 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-21 13:42:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-21 13:42:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 13:42:22,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:22,699 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:22,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:42:22,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:22,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1926519011, now seen corresponding path program 3 times [2022-11-21 13:42:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:22,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158198426] [2022-11-21 13:42:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:42:23,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158198426] [2022-11-21 13:42:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158198426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:42:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142122589] [2022-11-21 13:42:23,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 13:42:23,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:23,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:23,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:42:23,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:42:26,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 13:42:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:42:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:42:26,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:42:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:42:26,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:42:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-21 13:42:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142122589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:42:26,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:42:26,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-21 13:42:26,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819032608] [2022-11-21 13:42:26,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:42:26,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 13:42:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:42:26,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 13:42:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 13:42:26,596 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:42:26,870 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-11-21 13:42:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:42:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-21 13:42:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:42:26,872 INFO L225 Difference]: With dead ends: 123 [2022-11-21 13:42:26,872 INFO L226 Difference]: Without dead ends: 97 [2022-11-21 13:42:26,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-21 13:42:26,873 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:42:26,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 24 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:42:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-21 13:42:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-21 13:42:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-11-21 13:42:26,884 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 48 [2022-11-21 13:42:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:42:26,885 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-11-21 13:42:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-11-21 13:42:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-21 13:42:26,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:26,888 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:26,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:42:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:27,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -154707891, now seen corresponding path program 4 times [2022-11-21 13:42:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015172599] [2022-11-21 13:42:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-21 13:42:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015172599] [2022-11-21 13:42:28,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015172599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:42:28,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007533193] [2022-11-21 13:42:28,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 13:42:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:28,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:28,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:42:28,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:42:28,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 13:42:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:42:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 13:42:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:42:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-21 13:42:28,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:42:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-11-21 13:42:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007533193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:42:29,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:42:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-21 13:42:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353467688] [2022-11-21 13:42:29,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:42:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-21 13:42:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:42:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-21 13:42:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 13:42:29,500 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:42:30,032 INFO L93 Difference]: Finished difference Result 243 states and 292 transitions. [2022-11-21 13:42:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 13:42:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-21 13:42:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:42:30,035 INFO L225 Difference]: With dead ends: 243 [2022-11-21 13:42:30,035 INFO L226 Difference]: Without dead ends: 193 [2022-11-21 13:42:30,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-21 13:42:30,037 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:42:30,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 36 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:42:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-21 13:42:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-21 13:42:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-11-21 13:42:30,054 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 96 [2022-11-21 13:42:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:42:30,054 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-11-21 13:42:30,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:42:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-11-21 13:42:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-21 13:42:30,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:42:30,060 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:42:30,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:42:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:30,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 13:42:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:42:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -224503123, now seen corresponding path program 5 times [2022-11-21 13:42:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:42:30,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401170647] [2022-11-21 13:42:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:42:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:42:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:42:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-11-21 13:42:33,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:42:33,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401170647] [2022-11-21 13:42:33,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401170647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:42:33,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436307655] [2022-11-21 13:42:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 13:42:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:42:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:42:33,752 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:42:33,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b5bf0e3-a17a-4e62-945b-fbf5f63a9f33/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process